US6539955B1 - Acoustical insulation blanket for dishwasher - Google Patents

Acoustical insulation blanket for dishwasher Download PDF

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Publication number
US6539955B1
US6539955B1 US09/676,163 US67616300A US6539955B1 US 6539955 B1 US6539955 B1 US 6539955B1 US 67616300 A US67616300 A US 67616300A US 6539955 B1 US6539955 B1 US 6539955B1
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United States
Prior art keywords
dishwasher
washing chamber
insulation blanket
acoustical insulation
acoustical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US09/676,163
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English (en)
Inventor
Jeffrey Allan Tilton
Phil J. Johnson
Gary James Newman
Kurt G. Melia
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Owens Corning Intellectual Capital LLC
Original Assignee
Owens Corning Fiberglas Technology Inc
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Application filed by Owens Corning Fiberglas Technology Inc filed Critical Owens Corning Fiberglas Technology Inc
Priority to US09/676,163 priority Critical patent/US6539955B1/en
Assigned to OWENS-CORNING FIBERGLASS TECHNOLOGY, INC. STATE OF ILLINOIS CORPORATION reassignment OWENS-CORNING FIBERGLASS TECHNOLOGY, INC. STATE OF ILLINOIS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MELIA, KURT G., JOHNSON, PHIL J., NEWMAN, GARY JAMES, TILTON, JEFFREY ALLAN
Priority to CA002420505A priority patent/CA2420505C/fr
Priority to EP01975793A priority patent/EP1322213A2/fr
Priority to PCT/US2001/042327 priority patent/WO2002026100A2/fr
Priority to AU2001295081A priority patent/AU2001295081A1/en
Priority to MXPA03002656A priority patent/MXPA03002656A/es
Publication of US6539955B1 publication Critical patent/US6539955B1/en
Application granted granted Critical
Assigned to OWENS CORNING INTELLECTUAL CAPITAL, LLC reassignment OWENS CORNING INTELLECTUAL CAPITAL, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OWENS-CORNING FIBERGLAS TECHNOLOGY, INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4209—Insulation arrangements, e.g. for sound damping or heat insulation
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4246—Details of the tub

Definitions

  • the present invention relates generally to dishwasher technology and, more particularly, to a method of insulating a dishwasher with an acoustical insulation blanket of thermoplastic material and a dishwasher so insulated.
  • Such dishwashers generally include a washing chamber for holding the dishes and one or more streams of pressurized fluid for washing food and drink residue from the dishes.
  • the washing process generates considerable noise, which can be quite annoying to the user.
  • it has long been known to provide dishwashers with acoustical insulation.
  • acoustical insulation systems for dishwashers generally comprise sound transmission barriers and sound absorption layers.
  • acoustical insulation involves enclosing the noise source in an insulation structure.
  • a typical form of acoustical insulation is a layer of mineral fiber insulation, such as fiberglass insulation, wrapped around or positioned around the source of unwanted noise.
  • fiberglass absorber is usually incorporated in the front door panel of an under-the-counter dishwasher. The blanket of glass fibers absorbs some of the sound energy entering the fiberglass board, thereby resulting in a reduced transmission of unwanted sound from the source of the sound in the dishwasher.
  • fiberglass absorbers While useful for its intended purpose, fiberglass absorbers suffer from a number of shortcomings. Fiberglass material may potentially cause skin irritations when repeatedly handled. In order to address this problem and protect manufacturing employees who repeatedly handle the fiberglass insulation boards, the boards are now encapsulated in a polyethylene or like film. Such an arrangement is disclosed in U.S. Pat. Nos. 4,985,106 and 5,044,705. Although effective for protecting individuals from contact with the fiberglass material, this processing does not allow for exact fit and function when the board is installed on a dishwasher. Specifically, cutout areas such as those provided around water supply and drain lines must be oversized to allow for the encapsulation process. These oversized cutout areas leave gaps between the fiberglass board and the projecting structures that often impair the acoustical performance of the material.
  • the polyethylene outer film has a tendency to catch on objects. This complicates the packaging of the dishwasher by the manufacturer. Specifically, corner posts and boxes are used to package the finished under-the-counter dishwasher and the exposed polyethylene layer may catch and tear exposing the fiberglass insulation. Of course, the outer polyethylene layer or film may also be torn when installing or removing the dishwasher for repair. As noted above such tears expose bare fiberglass potentially causing irritation to the worker or homeowner. As a further consideration, the resulting poor appearance may also adversely affect customer satisfaction with the dishwasher.
  • the fiberglass board cannot be contour molded. Accordingly, the thickness of the fiberglass used is determined by the minimum clearance point between the outer casing of the dishwasher and the under counter opening for which the dishwasher is designed.
  • an improved dishwasher includes a housing having a washing chamber and a door for gaining access to the washing chamber.
  • a washing nozzle is provided in the washing chamber. The nozzle functions to direct a fluid stream against dishes held in the washing chamber.
  • a circulation pump circulates fluid under pressure through the washing nozzle.
  • the dishwasher also includes a supply line for delivering fluid to the circulation pump and a drain line for discharging fluid from the washing chamber.
  • the dishwasher includes an acoustical insulation blanket of thermoplastic material.
  • the acoustical insulation blanket extends around the washing chamber and the circulation pump and is precisely cut to fit snugly around the fluid supply line and the drain line so as to eliminate gaps therebetween and the acoustical leaks associated therewith.
  • the thermoplastic material utilized for the acoustical insulation blanket is selected from a group of fibers consisting of polyester, polyolefin, polyethylene, rayon, nylon, acrylic, hemp, kenaf, cotton and combinations thereof.
  • the acoustical insulation blanket may be composed of polyester staple fibers and polyester bicomponent fibers of distinct diameters typically between 8.0 and 50.0 microns and distinct lengths typically between 0.5 and 3.0 inches.
  • the acoustical insulation blanket may also include melt blown microfibers.
  • the acoustical insulation blanket may include a facing layer such as a scrim in order to protect the material during handling of the dishwasher.
  • the acoustical insulation blanket may include a relatively high-density skin on at least one face thereof for the same purpose.
  • a method for insulating a dishwasher.
  • the method comprises the step of enclosing the noise generating components of the dishwasher in an acoustical insulation blanket of thermoplastic material.
  • the method may include the step of precisely cutting the acoustical insulation blanket to fit snugly around selected projecting structures so as to eliminate gaps between the blanket and the structures and, therefore, acoustical leaks associated with those gaps.
  • the method may include the step of contour molding the acoustical insulation blanket to a desired shape. Further, the method includes the crimping of the acoustical insulation blanket in selected areas. Together, the contour molding and crimping allow a custom fit for any particular application and thereby ensure that acoustical insulating efficiencies of the material are maximized.
  • FIG. 1 a is a schematic view in partially cut away perspective of a dishwasher incorporating a novel acoustical insulation blanket
  • FIG. 1 b is a schematic, detailed elevational view showing the snug fit of the acoustical insulation blanket around the supply and drain lines.
  • FIG. 2 a is a cross sectional view of a first embodiment of the acoustical insulation blanket
  • FIG. 2 b is a cross sectional view of a second embodiment of the acoustical insulation blanket
  • FIG. 2 c is a cross sectional view of a third embodiment of the acoustical insulation blanket.
  • FIG. 2 d is a cross sectional view of a fourth embodiment of the acoustical insulation blanket.
  • Dishwasher 10 includes a housing or cabinet 12 including a washing chamber 14 and a door 16 .
  • the door 16 may be opened in order to gain access to the washing chamber 14 into which dishes are placed for washing.
  • the dishwasher 10 is an under-the-counter design suitable for insertion and mounting in a cavity C formed in a kitchen cabinet K.
  • the dishwasher 10 also includes a circulation pump 18 .
  • the circulation pump 18 circulates fluid, such as wash water, from a supply line 20 to a washing nozzle 22 provided in the washing chamber 14 .
  • the washing nozzle 22 directs the fluid stream against the dishes held in the washing chamber 14 so as to scrub and lift food and drink residue from the dishes and provide the desired cleaning action.
  • a drain line 24 discharges fluid entrained with food and drink residue and debris from the washing chamber 14 .
  • FIGS. 1 and 1 a specifically show the acoustical insulation blanket 26 in the form of panels including door panel 19 behind facing 29 , side insulation panel 21 , top insulation panel 23 , rear insulation panel 25 and bottom panel 27 . Similar panels (not shown), may be provided on the opposite side and bottom of the dishwasher 10 . Further, while the insulation panels 19 , 21 , 23 and 25 are shown as individual pieces or elements, it is to be understood that these panels could be formed as one piece or in any other configuration suitable for providing acoustical insulation for the dishwasher 10 .
  • the thermoplastic material of the acoustical insulation blanket 26 is selected from a group of fibers consisting of polyester, polyolefin, polyethylene, rayon, nylon, acrylic, hemp, kenaf, cotton and combinations thereof.
  • the acoustical insulation blanket 26 is composed of polyester stable fibers and polyester bicomponent fibers. These fibers have distinct diameters of between about 8.0-50.0 microns and distinct lengths of between about 0.5 and 3.0 inches. It should be appreciated, however, that the blanket may also include melt blown microfibers if desired.
  • the acoustical insulation blanket 26 may comprise a single layer 28 of the thermoplastic material.
  • the thermoplastic material may be of a consistent or varying density across its thickness.
  • the acoustical insulation blanket 26 may include an outer facing layer 30 , which may be bonded by adhesive or other means to the thermoplastic material layer 28 .
  • the facing layer 30 may be made from polyester, polypropylene, rayon, nylon, metallic foil or any combination thereof.
  • the facing 30 may also be reinforced or non-reinforced. Reinforcements add durability and structural integrity. Reinforcements may take the form of fibrous scrims, fibrous mats or fibrous webs.
  • the acoustical insulation blanket may comprise a single layer of thermoplastic material 32 with a relatively high density outer skin 34 .
  • Such a construction may be achieved by searing and/or layering in accordance with the forming processes disclosed and described in co-pending U.S. patent application Ser. No. 09/607,478, entitled Process for Forming a Multilayer, Multidensity Composite Insulator, filed on Jun. 30, 2000, herein incorporated by refference.
  • the acoustical insulation blanket 26 may comprise a single layer 36 of thermoplastic material including a relatively high density outer skin 38 and a facing layer 40 of the type described above with regard to the FIG. 2 b embodiment.
  • the facing layers 30 , 40 and high density skins 34 , 38 function individually or in combination to provide enhanced handling properties and good puncture and tear resistance. This allows the acoustical insulation blanket 26 to be readily shaped or even contour molded to enhance its fit on the housing 12 of the dishwasher 10 . Additionally, it simplifies packaging as neither the facing layer 30 , 40 nor the high density skin 34 , 38 are prone to tearing in the manner of the polyethylene film used to encapsulate fiberglass insulation as previously utilized in the art. Additionally, the facing layer 30 , 40 and/or skin 34 , 38 provide a more aesthetically pleasing appearance that is capable of substantially increasing customer satisfaction with the dishwasher 10 .
  • a method of insulating a dishwasher 10 includes a step of enclosing the noise-generating components of the dishwasher in an acoustical insulation blanket 26 of thermoplastic material.
  • the method may be further described as including the step of precisely cutting the acoustical insulation blanket 26 to fit snugly around selected projecting structures so as to eliminate gaps between the blanket and those projecting structures.
  • Projecting structures around which the acoustical insulation blanket 26 extends include but are not limited to the water supply line 20 leading to the circulation pump 18 and the drain line 24 leading from the washing chamber 14 (see FIG. 1 a ).
  • the method may also include the step of contour molding the acoustical insulation blanket 26 into a desired shape customized for the particular dishwasher application. Still further the method may include the step of crimping the acoustical insulation blanket 26 in selected areas. Crimping creates areas of very thin, high-density material that is extremely durable. Accordingly, crimping may be provided around attachment points to help lock the blanket 26 in place and prevent fasteners from pulling out.
  • the polymer fiber blanket may also be crimped or contoured to fit around and over protrusions on the dishwashers outer casing thus providing extended acoustical coverage and acoustical seals that are not possible with encapsulated fiberglass insulation materials utilized in the past.
  • the thickness of the acoustical insulation blanket 26 may be maximized at all locations within the limits of available clearance to provide improved acoustical performance.
  • prior art fiberglass insulating mats are limited in thickness to the minimum clearance point between the dishwasher housing 12 and the height of the cabinet into which the dishwasher 10 is mounted.
  • the acoustical insulation blanket 26 may include a facing layer and/or a skin of relatively high density on both faces, not just one face as shown in the drawing figures. Further, the acoustical insulation blanket 26 may include a pad of vibration barrier insulation material (e.g., asphalt) on the top face, the bottom face and/or between layers.
  • vibration barrier insulation material e.g., asphalt

Landscapes

  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Electric Suction Cleaners (AREA)
  • Washing And Drying Of Tableware (AREA)
US09/676,163 2000-09-29 2000-09-29 Acoustical insulation blanket for dishwasher Expired - Lifetime US6539955B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US09/676,163 US6539955B1 (en) 2000-09-29 2000-09-29 Acoustical insulation blanket for dishwasher
AU2001295081A AU2001295081A1 (en) 2000-09-29 2001-09-27 Acoustical insulation blanket for dishwasher
EP01975793A EP1322213A2 (fr) 2000-09-29 2001-09-27 Enveloppe d'isolation acoustique pour lave-vaisselle
PCT/US2001/042327 WO2002026100A2 (fr) 2000-09-29 2001-09-27 Enveloppe d'isolation acoustique pour lave-vaisselle
CA002420505A CA2420505C (fr) 2000-09-29 2001-09-27 Enveloppe d'isolation acoustique pour lave-vaisselle
MXPA03002656A MXPA03002656A (es) 2000-09-29 2001-09-27 Instalacion de cubierta acustica para lavaplatos.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/676,163 US6539955B1 (en) 2000-09-29 2000-09-29 Acoustical insulation blanket for dishwasher

Publications (1)

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US6539955B1 true US6539955B1 (en) 2003-04-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
US09/676,163 Expired - Lifetime US6539955B1 (en) 2000-09-29 2000-09-29 Acoustical insulation blanket for dishwasher

Country Status (6)

Country Link
US (1) US6539955B1 (fr)
EP (1) EP1322213A2 (fr)
AU (1) AU2001295081A1 (fr)
CA (1) CA2420505C (fr)
MX (1) MXPA03002656A (fr)
WO (1) WO2002026100A2 (fr)

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US20040023587A1 (en) * 2002-08-02 2004-02-05 C.T.A. Acoustics Acoustical insulation laminate with polyolefin layer and process for making
US20040256173A1 (en) * 2001-09-05 2004-12-23 Brett Eilers Sound reducing device for a coffee grinder and other kitchen appliances
US20050076938A1 (en) * 2003-10-09 2005-04-14 Maytag Corporation Sound sealing system for a dishwasher
US20050092353A1 (en) * 2003-10-29 2005-05-05 Retsema Andrew J. Dishwasher and motor cavity sound attenuator
US20050136235A1 (en) * 2003-06-30 2005-06-23 Rockwell Anthony L. Multilayer densified surface to improve air flow resistance and structural properties
US20070042156A1 (en) * 2005-08-22 2007-02-22 Rockwell Anthony L Die cut insulation blanket and method for producing same
US20070095454A1 (en) * 2004-09-02 2007-05-03 Panther Allen L Ultrasonic joining of polymer mats to mechanical devices including electric appliances
US20070102029A1 (en) * 2005-11-04 2007-05-10 Panther Allen L Acoustic seal for use in kitchen appliance
US20070119481A1 (en) * 2003-10-09 2007-05-31 Bsh Bosch Und Siemens Hausgerate Gmbh Dishwasher with variable heat damping
US20070272285A1 (en) * 2006-02-27 2007-11-29 Herreman Kevin M Appliance noise reduction blanket
US20080128005A1 (en) * 2006-12-01 2008-06-05 Electrolux Home Products, Inc. Dishwasher apparatus including sound absorbing device
US20080236637A1 (en) * 2007-03-26 2008-10-02 Joon Ho Pyo Dishwasher and sound-insulation member therefor
US20080236638A1 (en) * 2007-03-30 2008-10-02 Electrolux Home Products, Inc. Dishwasher pump apparatus with a sound absorbing layer
US20080289664A1 (en) * 2007-05-24 2008-11-27 Rockwell Anthony L Modular drip pan and component mounting assembly for a dishwasher
US20080317996A1 (en) * 2005-08-22 2008-12-25 Rockwell Anthony L Die Cut Insulation Blanket
US20090173368A1 (en) * 2008-01-09 2009-07-09 Electrolux Home Products, Inc. Drain pump assembly for a dishwasher and associated device and method
US20090253323A1 (en) * 2008-04-03 2009-10-08 Usg Interiors, Inc. Non-woven material and method of making such material
US20090252941A1 (en) * 2008-04-03 2009-10-08 Usg Interiors, Inc. Non-woven material and method of making such material
US20100024851A1 (en) * 2008-08-04 2010-02-04 Rockwell Anthony L Insulation Element For An Electrical Appliance Such As A Dishwasher
US20100180916A1 (en) * 2009-01-22 2010-07-22 Electrolux Home Products, Inc. Acoustic panel
US20100187958A1 (en) * 2009-01-27 2010-07-29 Electrolux Home Products, Inc. Dishwasher having sound attenuating structures
WO2011084954A1 (fr) 2010-01-05 2011-07-14 Owens Corning Intellectual Capital, Llc Emballage de produit restant avec le produit et fonctionnant comme une isolation acoustique et/ou thermique
WO2011084955A1 (fr) 2010-01-05 2011-07-14 Owens Corning Intellectual Capital, Llc Capsule d'expédition contenant une couverture et procédé
US20110233086A1 (en) * 2010-03-26 2011-09-29 Owens Corning Intellectual Property, LLC Washing machine shipping system and method
US20110232701A1 (en) * 2009-01-27 2011-09-29 Electrolux Home Products, Inc. Mastic-less dishwasher providing increasing energy efficiency and including a recyclable and reclaimable tub
US20120013228A1 (en) * 2010-07-16 2012-01-19 BSH Bosch und Siemens Hausgeräte GmbH Method for manufacturing a dishwasher with at least one, especially prefabricated, bitumen mat for deadening of noise and/or sound absorption of a component
US20150097472A1 (en) * 2013-10-09 2015-04-09 Owens Corning Intellectual Capital, Llc Dishwasher insulation blanket
US9193131B2 (en) 2013-03-14 2015-11-24 Cta Acoustics, Inc. Thermal and acoustical insulation
US9427133B2 (en) * 2014-03-10 2016-08-30 Owens Corning Intellectual Capital, Llc Dishwasher insulation blanket
US9453296B2 (en) 2013-02-18 2016-09-27 Owens Corning Intellectual Capital, Llc Acoustically insulated machine
US9506181B2 (en) 2010-01-05 2016-11-29 Owens Corning Intellectual Capital, Llc Appliance having dampening portion and method
US9714480B2 (en) 2011-05-24 2017-07-25 Owens Corning Intellectual Capital, Llc Acoustically insulated machine
US9845564B2 (en) 2010-12-31 2017-12-19 Owens Corning Intellectual Capital, Llc Appliance having a housing dampening portion and method
US9993990B2 (en) 2013-03-14 2018-06-12 Cta Acoustics, Inc. Thermal insulation

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US6807700B2 (en) * 2002-07-09 2004-10-26 Owens Corning Fiberglass Technology, Inc. Acoustical laundry tub blanket
DE102009000524A1 (de) * 2009-01-30 2010-08-05 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit Schallschutzelement
CA3004434A1 (fr) * 2015-11-06 2017-05-11 Owens Corning Intellectual Capital, Llc Machine isolee acoustiquement

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Cited By (57)

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Publication number Priority date Publication date Assignee Title
US20030008592A1 (en) * 2000-06-30 2003-01-09 Block Thomas L. Hood, dash, firewall or engine cover liner
US8361912B2 (en) * 2000-06-30 2013-01-29 Owens Corning Intellectual Capital, Llc Hood, dash, firewall or engine cover liner
US20080023260A1 (en) * 2001-09-05 2008-01-31 Brett Eilers Sound reducing device for a coffee grinder and other kitchen appliances
US20040256173A1 (en) * 2001-09-05 2004-12-23 Brett Eilers Sound reducing device for a coffee grinder and other kitchen appliances
US7481296B2 (en) * 2001-09-05 2009-01-27 Brett Eilers Sound reducing device for a coffee grinder and other kitchen appliances
US20090114475A1 (en) * 2001-09-05 2009-05-07 Brett Eilers Sound reducing device for a coffee grinder and other kitchen appliances
US20040023587A1 (en) * 2002-08-02 2004-02-05 C.T.A. Acoustics Acoustical insulation laminate with polyolefin layer and process for making
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AU2001295081A1 (en) 2002-04-08
CA2420505C (fr) 2009-03-31
MXPA03002656A (es) 2003-06-24
WO2002026100A2 (fr) 2002-04-04
CA2420505A1 (fr) 2002-04-04
EP1322213A2 (fr) 2003-07-02

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